Đáp án:
Giải thích các bước giải:
`(x+1)/2018 + (x+2)/2017 + (x+3)/2016 +( x+4)/2015=-4`
`=>(x+1)/2018 + (x+2)/2017 + (x+3)/2016 +( x+4)/2015+4=0`
`=>((x+1)/2018+1) + ((x+2)/2017 +1)+( (x+3)/2016 +1)+(( x+4)/2015+1)=0`
`=>((x+1)/2018+2018/2018) + ((x+2)/2017 +2017/2017)+( (x+3)/2016 +2016/2016)+(( x+4)/2015+2015/2015)=0`
`=>(x+2019)/2018 + (x+2019)/2017 + (x+2019)/2016 +( x+2019)/2015=0`
`=>(x+2019)(1/2018 + 1/2017 + 1/2016 +1/2015)=0`
`=>x+2019=0`
`=>x=-2019`
